Look at the Size of this Bob Jackson, Show Your Tall Bikes!!!!!!!
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Yeah, mixte tubes would have been a possible option.
Well, maybe I found who I want to draft behind on my next ride!
Well, maybe I found who I want to draft behind on my next ride!
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Check the diameter of the seat stays...beefy! They look as wide as the tires.
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Commuter setup
I can only guess it's because the top tube is shorter, bringing the headtube closer the the seattube. Still, I'd love to take this for a testride, since it's most definitely lighter than my gaspipe steed.
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Why do frames seem to "top out" at 58cm top tube? I've seen a few 60cm tt, but rarely bigger. It is like they are forcing big dudes into a more upright and less aero position. I believe this was a conspiracy by smaller guys to get an even bigger wall to draft behind?
I understand that if you built a huge, say 70 x 70 frame, it would be noodly, but wouldn't an extra tt help that? Or some more triangles like Yao's ride? Isn't that why big-boy Rivendells come with an extra tt?
I understand that if you built a huge, say 70 x 70 frame, it would be noodly, but wouldn't an extra tt help that? Or some more triangles like Yao's ride? Isn't that why big-boy Rivendells come with an extra tt?
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That Jackson looks bigger than 68... here is a 68 cm Fuji Sports 12 frame I picked up off Craigs a couple weeks ago. Threw some wheels on it to demonstrate hugeness. I think its roughly an '80. I'm 6'5" and the stand over height is insane.
#32
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Mondia seems to be the exception among vintage marques. Most Mondias I've seen have a top tube just about the same length as the seat tube.
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For once I see a bike that I is TOO BIG for me to ride
Aaron
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Webshots is bailing out, if you find any of my posts with corrupt picture files and want to see them corrected please let me know. :(
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#34
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So I messaged the seller and they said from center of crank up the seat tube to the center of the top tube it's 68cm.
I know manufacturers advertised based on center or top of the crossbar but is there a standard that most here go by?
I was always under the impression that center of crank to top of crossbar was the accepted measurement.
.
I know manufacturers advertised based on center or top of the crossbar but is there a standard that most here go by?
I was always under the impression that center of crank to top of crossbar was the accepted measurement.
.
#35
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Just stumbled across this and thought I'd post the link for all you tall riders: https://philadelphia.craigslist.org/bik/2966160446.html
Last edited by NightShift; 05-02-12 at 12:37 AM.
#36
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So I messaged the seller and they said from center of crank up the seat tube to the center of the top tube it's 68cm.
I know manufacturers advertised based on center or top of the crossbar but is there a standard that most here go by?
I was always under the impression that center of crank to top of crossbar was the accepted measurement.
.
I know manufacturers advertised based on center or top of the crossbar but is there a standard that most here go by?
I was always under the impression that center of crank to top of crossbar was the accepted measurement.
.
There have been two methods of measuring for a long time, probably because they started in different countries. With standard diameter top tubes, it makes only a small difference.
Frames with tight clearances for wheels have longer head tubes, making them look bigger.
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Also, BB height (or BB drop, more precisely) and seat tube angle affect head tube length. A track frame with an 11" BB height 'lengthens' the head tube by about one-half inch vs. one that is otherwise the same but has a 10.5" BB height.....
650B frames have longer headtubes than the same size of 700c frames, etc., etc....
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Shawn Bradley and his 80cm Trek, which was comically stolen from his house by a guy about 5'11" (but thankfully later found and returned). Why didn't they give him longer chainstays? I can't imagine there being much confidence on climbs if you wheelie whenever you sit down.
#39
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Of course I have to post my huge Fuji for size comparison ;p
*edit* I know, I know... my pics are stale. I got to get a new build going now that the semester is over.
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There's also this one: https://philadelphia.craigslist.org/bik/2991474779.html
A 68cm Super Course.
A 68cm Super Course.
Just stumbled across this and thought I'd post the link for all you tall riders: https://philadelphia.craigslist.org/bik/2966160446.html
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Just stumbled across this and thought I'd post the link for all you tall riders: https://philadelphia.craigslist.org/bik/2966160446.html
The largest top tube I have seen by any brand are the Bridgestone's. On my 400 the st is 68cm and the top tube is 62cm, making it the only bike I do not need a 130-140 Nitto extension. It is not whippy at all, but it is not double butted, Bridgestone double butted all 400'd only up to 64cm.
#42
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Could it be that really tall people still have fairly "standard" vertebrae? i.e., difference in height is more a function of leg length than back length? Just a theory. I was under the impression that vertebrae don't vary much in size, but I could be wrong.
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There's currently a 70 cm Gazelle Champion Mondial for sale over here. Pretty easy on the eyes for such a large frame:
https://fietsen-brommers.marktplaats....5-biopace.html
https://fietsen-brommers.marktplaats....5-biopace.html
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My '85 Trek 600 and '72 Raleigh SuperCourse have a seat tube (CtT) of 64cm. Head tubes are 22 & 21cm respectively. TTs measure 58.5 (CtC). With 27" wheels the SuperCourse is as tall a bike as I dare ride. 6'1" and a tad. The old school of "straddle the TT with a fist of seatpost" still works in the new world of people riding smaller & smaller frames.
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#47
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Most really tall people have proportionately long legs, but there are exceptions (think Andre).
#48
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Why do frames seem to "top out" at 58cm top tube? I've seen a few 60cm tt, but rarely bigger. It is like they are forcing big dudes into a more upright and less aero position. I believe this was a conspiracy by smaller guys to get an even bigger wall to draft behind?
I needed a short stem on this bike because the massive head tube forced me into a somewhat upright position. My other bike , a 62cm, also has a 61cm TT but I ride with a 130 stem to get that comfy flat forward extension. On the 67cm with a 130 stem I felt like I was uncomfortably reaching for the bars
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So how did the Bob Jackson not sell?
There was bidding on it but it shows to be ended with no bids, it was a no reserve auction so I'm confused.
There was bidding on it but it shows to be ended with no bids, it was a no reserve auction so I'm confused.
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At T-Town on Saturday, Sam Fitzsimmons brought along a slew of HUGE bikes and frames. I think someone mentioned the Witcomb as being a 28.5" (72.4cm), and I saw that frame there. There was another one Sam had there which was even larger, measuring 74cm (c-c).